Leticia has worked for 10 years in the public relations department of a large firm. she has not been promoted to any executie position in her firm even though she has directed several successful projects for the firm. her lack of promotion is an example of: the "grass ceiling" the "crystal palace" the "mommy track" sexual harrasment

The correct option is "glass ceiling" (note: its "glass" not "grass")

The glass ceiling effect is a term that refers to a metaphorical and invisible (just like glass) barrier that keeps women and other social minorities from being promoted and climbing up the corporate ladder to CEO and other top managerial jobs at organizations they work at. 

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.